<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div {
            margin: 10px;
            padding: 5px;
            font-size: 14px;
            line-height: 25px;
        }

        .father {
            border: 1px solid #cb0d0d;
        }

        .first {
            border: 1px solid #0093E9;
            background-color: #009399;
        }

        .second {
            border: 1px solid #80D0C7;
            background-color: #80D077;
        }

        .third {
            border: 1px solid #c5c5cb;
            background-color: #c5c5cc;
        }
    </style>
</head>
<body>
<div class="father">
    <div class="first">第一个盒子</div>
    <div class="second">第二个盒子</div>
    <div class="third">第三个盒子</div>
</div>
</body>
</html>